Flowmeter Applications

Flowmeter Applications

Example of a chemical proportioning system
using +GF+ Signet Flow Systems

Chemical proportioning system allows for an accurate volumetric ratio to be maintained between the process liquid volume and the chemical injection volume. Real applications include injection or introduction of:

• vitamins into farm animal drinking water
• sodium hypochlorite disinfectant into water
• fertilizer into irrigation water
• bio-engineered organisms into liquids for manufacturing products such as man-made snow, soaps for large laundries, defoaming chemicals, and insecticides.

A pressure drop is created as water or gas enters through the meter's inlet. The fluid is forced to form thin laminar streams that flow in parallel paths between internal plates separated by spacers. The pressure differential created by the fluid drag is measured by a differential pressure sensor connected to the top cavity plate. The differential pressure from one end of the laminar flow plates to the other end is linear and proportional to the flow rate of the water or gas.

Installing Your Paddle-Wheel Flow Sensor

For best results, allow a straight run of pipe before and after the sensor after any bends, valves, or flow restrictions.
Stated accuracy is not guaranteed unless the Signet installation fittings are used. The installation fitting ensures proper paddle depth and orientation.


In horizontal pipe runs with no air
pockets or sediments present, mount the sensor/fitting in the 12 o'clock or 6 o'clock position. If sediment or air pockets are present, tilt the sensor/fitting at a maximum angle of 45° to avoid these obstacles. Vertical runs require upward flow. Pipes must be full.

Distributed by Abu-Iyad